Subject: Graph, Ocean Tides

Construct graph of tidal height versus time. Use the following guidance to
set up the graph: 10 days per sheet of graph paper (30 days total); use 
three sheets of graph paper (per student), taped together.

Y-Axis
Tidal Height: -1' to 6', 4 blocks per foot

X-Axis
Time
4 blocks per day: label 12M, 6A, 12N, 6P

On tide chart, times are expressed in 24-hour clock: a.m. times same; p.m.
times, subtract 12.

Label crests (high tides) and troughs (low tides) using 12-hour format.

Label the following Moon phases: New Moon; First Quarter; Full Moon; Last
Quarter

SUMMARY QUESTIONS

1. Describe as many patterns as you are able to recognize by looking at
the graph.

A. 3-4 tides per day, H-->L-->H, etc., ~6 hr. apart (~50 min.). Tidal
range varies from day-to-day.

2. What is the relationship between Moon phase and tidal range?

A. New/Full - greatest tidal range; Quarter phases - smallest tidal range.  
Two-week cycle.

==
[SCSA link to "At the Beach"/Ocean City, MD has moved to....]
2005 Water Level Tidal Predictions
http://www.co-ops.nos.noaa.gov/tides05/

Height of Tide at Any Time: Instructions for converting daily high and low 
predictions into tidal heights for any given time.
http://www.co-ops.nos.noaa.gov/publications/table3.pdf

http://www.co-ops.nos.noaa.gov/tides05/tab2ec2b.html#42
[Click on link to "Predictions"]
2005 Ocean City, MD (fishing pier)
http://www.co-ops.nos.noaa.gov/cgi-bin/get_pred.cgi?year=2005&stn=0280+
Ocean+City

--
USNO
http://aa.usno.navy.mil/faq/docs/other_sites.html
Tides
In the U.S., tide tables are distributed by the National Ocean Service, a
part of NOAA. NOAA/NOS also provides online tide predictions for the next
six months for U.S. tidal reference stations. The University of South
Carolina also maintains an online tide and current predictor.
http://www.nos.noaa.gov/
http://www.opsd.nos.noaa.gov/tp4days.html
http://tbone.biol.sc.edu/tide/sitesel.html